||From what I've seen, FlakJak goggles are "the goggle" for airsoft players. I use them, my friends use them, and most people at my local airsoft site use them, and this is for good reason. The goggles are very sturdy, it is very easy to swap lenses, and the lenses don't break. I've been hit in the face with these, so I can vouch for there protection. The only main problem I've had with them is that (while wearing a mesh lower face mask) there is sometimes a slight gap by the bridge of your nose. This can easily be fixed by using a helmet to apply some downward force on the goggles (or spending a lot of time adjusting the mask). Another thing I should mention is they still fog up sometimes while wearing a mesh mask. Not as much as with a paintball mask, but they are goggles and people will always exhale warm air. Also, I feel obligated to say that when I bought these from Evike about a year ago they were only $30. I was about to buy a second pair today until I saw the twenty dollar increase. Don't get me wrong, the protection of your eyes is worth way more than $50, but I already have a pair.
Protects your eyes
Very durable (I believe they meet military standards)
Fits with most mesh and plastic lower face masks
Comes with two lenses (very extremely to swap them out)
Occasionally fogs while wearing a lower face mask (but there is nothing you can do about that)
Price was raised twenty bucks*
All in all, these protect your eyes extremely well. So if your looking for eye protection, FlakJaks do a whole lot better then shooting/sunglasses and I recommend them.
*not to go advertising a competitor's site, but AirsoftGI is still selling them for $27
(However they are currently out of stock (5/15/13))
Rating: [4 of 5 Stars!]